The calculator comment is a reference to the super sweet birthday message Will posted about Pinkett Smith when she turned 44 last Friday. On September 18, the "Men In Black" actor shared a 20-year-old throwback pic of the couple, captioning it: "I've told you 'I love you' at least 8,285 times. And of the nearly 3.96 billion women on the planet -- there is only 1 that I want to spend the rest of my life with."

D'awww!

This was taken at your mom's house 20 years ago. That's a long time ago!!! So I decided to do some math... I have sung...

Smith and Pinkett Smith -- who have faced affair and divorce rumors for a number of years -- tied the knot on New Year's Eve in 1997. They are parents to 17-year-old son Jaden and 14-year-old daughter Willow.